CN110438310A - A kind of hot die steel and its heat treatment method - Google Patents
A kind of hot die steel and its heat treatment method Download PDFInfo
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- CN110438310A CN110438310A CN201910654397.9A CN201910654397A CN110438310A CN 110438310 A CN110438310 A CN 110438310A CN 201910654397 A CN201910654397 A CN 201910654397A CN 110438310 A CN110438310 A CN 110438310A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- Y02P10/25—Process efficiency
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Abstract
The present invention relates to metal material Field of Heat-treatment more particularly to a kind of hot die steels and its heat treatment method.The heat treatment method includes the following steps: that mould steel 1) is warming up to 1100 DEG C -1300 DEG C with the rate of 80 DEG C -180 DEG C/min, keeps the temperature 3-10min；2) mould steel after heat preservation is quenched in quenching media；3) quenched mould steel is subjected to tempering.Using method provided by the present invention, gained hot-work die crystalline grain of steel will not be roughened, carbide more Dispersed precipitate, and temper resistance is good；It improves a lot in processing to the elevated temperature strength under same hardness, and improves the thermal fatigue property of mould steel；After being heat-treated to same hardness, the impact flexibility of new_type treatment rear mold steel is slightly higher compared with traditional handicraft；And heating in quenching technical, soaking time is greatly shortened in this method, can achieve the effect that saves time and cost for the product of small lot and small dimension.
Description
Technical field
The present invention relates to metal material Field of Heat-treatment more particularly to a kind of hot die steels and its heat treatment method.
Background technique
Important component of the hot die steel as mould steel, mainly for the manufacture of from being heated to recrystallization temperature or more
Solid metallic or high temperature fluent metal compression moulding mold.The work characteristics of hot die steel is: under certain load
So that red-hot solid metallic is generated plastic deformation, or makes high temperature fluent metal casting forming.Therefore the high temperature of hot die steel is strong
An important factor for degree is die life.And in use, hot die steel will have certain toughness, high tenacity
It can guarantee that brittle failure will not occur during military service for material.Therefore, the elevated temperature strength of hot die steel is improved, but simultaneously cannot
Reduce the toughness of material.
The elevated temperature strength for improving hot die steel at this stage mainly passes through solution strengthening, intercrystalline strengthening and second-phase strength
Etc. modes realize.Under the premise of not changing material composition, above hardening and tempering process has been the traditional handicraft optimized.
Because W, Mo, V, Nb alloying element are not easy back dissolving in 980~1050 DEG C of temperature ranges.If by improving quenching and preserving heat temperature
It spends and extends soaking time to improve the solid solubility of material, so that the elevated temperature strength of material is improved, but this technique will lead to material
The grain coarsening of material, toughness decline.Therefore prior art improves hot die steel high temperature under the premise of not reducing the toughness of material
The potentiality very little of intensity.
Summary of the invention
The present invention is to overcome the shortcomings of the existing technology, provide a kind of hot die steel and its heat-treating methods, institute of the present invention
The heat treatment method of offer can also improve the elevated temperature strength of material under the premise of guaranteeing toughness of material, and no pollution to the environment,
It is simple to operate, cost of manufacture is lower.
A kind of heat treatment method of hot die steel, includes the following steps:
1) mould steel is warming up to 1100 DEG C -1300 DEG C with the rate of 80 DEG C -180 DEG C/min, keeps the temperature 3-10min；
2) mould steel after heat preservation is quenched in quenching media；
3) by quenched mould steel carry out tempering, (through cooling) to obtain the final product.
The heat treatment method of hot die steel provided by the present invention,
Preferably, the mould steel at least contain, Mo, V, Nb element；It is further preferred that in the hot die steel
In, Mo content is 1-4wt%, and V content 0.2-2wt%, Nb content is less than 0.3wt%；
It is further preferred that Mo content is 2wt% or so, V content is 1wt% or so, Nb content be less than
0.3wt%.
As currently preferred technical solution, the mould steel is 25Cr3Mo2WNiVNb or 4Cr3Mo2NiVNbB steel
(HD)；
The mould steel 25Cr3Mo2WNiVNb can be by being prepared according to the raw material of following composition quality ratio:
C:0.25-0.32wt%；
Cr:2.5-3.2wt%；
Mo:1.6-2.5wt%；
W:0.2-1.0wt%；
Ni:0.5-1.5wt%；
V:0.2-1.0wt%；
Nb :≤0.1wt%；
Si :≤0.1wt%；
Mn :≤0.5wt%；
Surplus is Fe；
It is highly preferred that preparation method includes the following steps:
(1) raw material is forged to electrode bar by vacuum melting；
(2) double refining is carried out to the electrode bar that step (1) obtains and electroslag remelting obtains electroslag ingot；
(3) homogeneous annealing is carried out to the electroslag ingot that step (2) obtains；
(4) to step (3) by homogeneous annealing electroslag ingot forged to get.
It is further preferred that preparation method includes:
(1) by vacuum melting technology, intermediate frequency furnace melting will be carried out after the feed proportioning, pour into electrode bar
Then base forges into electrode bar in forge furnace；
(2) electroslag remelting process: by the resulting electrode bar polishing scale removal of step (1) hammer cogging, it is put into electroslag
In remelting apparatus, double refining is carried out, electroslag remelting cooling water system water temperature is not higher than 70 DEG C, and passing in and out water temperature difference is 8~10
DEG C, electroslag ingot is obtained after electroslag remelting；
(3) homogeneous is annealed: heating at least 5h is warming up to 1260 DEG C of 8~10h of heat preservation, then to cool down not less than 100 DEG C/h
Speed is down to 750 DEG C of heat preservation 6h, is furnace-cooled to 500 DEG C of slow cooling of coming out of the stove later；
(4) forging technology: 500 DEG C or so enter furnace 1h after be warming up to 860 DEG C and keep the temperature 1h, by 300 DEG C/h heating rate liter
Temperature to 1160 DEG C of heat preservation 1h, open and forge temperature not less than 1100 DEG C, forge temperature eventually not less than 850 DEG C.
As explanation and illustration, the 4Cr3Mo2NiVNbB steel (HD) can be bought or according to this field by commercial channel
Method is made by oneself.
The heat treatment method of mould steel of the present invention, it is preferable that the diameter of the mould steel is≤40mm；
The present invention passes through a large amount of creative experiment discoveries, in above-mentioned diameter range, the mould steel energy through Overheating Treatment
So that bar inner alloy element is generated good solid solution effect, external crystal grain also can be more tiny, gained mould steel it is inside and outside each
Item performance is more stable.
The heat treatment method of mould steel of the present invention, it is highly preferred that the diameter is 20-40mm.
The heat treatment method of mould steel of the present invention, about step 1):
Mould steel is warming up to 1100 DEG C -1300 DEG C with the rate of 80 DEG C -150 DEG C/min；
Preferably, 1100 DEG C -1150 DEG C are warming up to.
The present invention has found that at the temperature disclosed above, resulting mold crystalline grain of steel is thinner, the property of various aspects by creative research
It can be more preferably.
Under the control of above-mentioned temperature, guarantee that alloying element W and Mo whole back dissolving is solid to improve alloying element in mould steel
Solubility, the part alloying element V and Nb back dissolving, non-back dissolving alloying element V and Nb refine crystal grain.
Preferably, in this step, the time of the heating is no more than 12min, and the time more preferably heated up is in 6-
10min.Heating-up time control was evenly heated in 6-10 minutes certifiable hot die steels.
Preferably, this step uses induction coil to complete to heat.
The heat treatment method of mould steel of the present invention, about step 2):
Mould steel after heat preservation is cooled to 120 DEG C of -160 DEG C of quenchings in quenching media；Under above-mentioned cooling condition,
It can effectively ensure that martensite transfor mation is completed in mould steel, and control cooling temperature can effectively prevent crackle to generate.
Preferably, it is cooled to 140-160 DEG C.In this at a temperature of, the total quality of gained mould steel can be further promoted.
Preferably, the quenching media is in the quenching medias such as water, oil or inorganic salt solution, aqueous solutions of organic salts
One or more.Above-mentioned quenching media can be selected by those skilled in the art according to actual needs, not do this into one
The limitation of step.
The heat treatment method of mould steel of the present invention, about step 3):
Quenched mould steel is subjected to tempering in 550 DEG C of -660 DEG C of heat preservations；It is preferred that soaking time is 4-5h.
It is highly preferred that by quenched hot die steel in 580 DEG C of -660 DEG C of heat preservations.
Using heat treatment method proposed by the invention, austenitizing time is short when hot die steel quenches, austenite crystal
Grain is extremely tiny, and the martensitic crystal grains size of generation will not be roughened.Last resulting product tissue crystal grain is tiny, and toughness is high.
As the preferred technical solution of the present invention, the heat treatment method includes the following steps:
(1) mould steel of 20~40mm of φ is heated up after 6~10 minutes to 1100 DEG C~1150 DEG C in induction coil, is protected
Temperature 3~6 minutes；
(2) mould steel is taken out into water hardening immediately from induction coil, water cooling is to 140 DEG C -160 DEG C；
(3) it is tempered immediately after quenching, in 580 DEG C of -660 DEG C of heat preservation 4-5h.
Present invention simultaneously provides the obtained hot die steels of heat treatment method described in above-mentioned any one technical solution.
Compare the prior art, the beneficial effects of the present invention are:
Using method provided by the present invention, resulting hot-work die crystalline grain of steel will not be roughened, carbide more disperse point
Cloth reaches following effect: comparing with traditional hardening and tempering process, the temper resistance of mould steel is more preferable, in identical tempering temperature
Under, the hardness decrease speed of mould steel is slower；Mould steel improves a lot in processing to the elevated temperature strength under same hardness,
700 DEG C of elevated temperature strength improves nearly 50~100MPa, and elevated temperature strength improves the thermal fatigue property that can be improved mould steel；At heat
After managing same hardness, the impact flexibility of new_type treatment rear mold steel is slightly higher compared with traditional handicraft.Moreover, the side proposed
Heating in quenching technical, soaking time is greatly shortened in method；When can achieve saving for the product of small lot and small dimension
Between and cost effectiveness.
Certainly, implement any of the products of the present invention or method it is not absolutely required at the same reach all the above excellent
Point.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the metallographic structure photo of hot die steel obtained by embodiment 1-4.Wherein, (a) is embodiment 1, (b) is real
Example 2 is applied, (c) is embodiment 3, (d) is embodiment 4.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
The present embodiment provides a kind of heat treatment method of hot die steel, the mould steel that the present embodiment uses is specification φ 20
The heat-resistance and wear-resistance steel 25Cr3Mo2WNiVNb of × 100mm.
Heat treatment method includes the following steps:
1) mould steel is placed in induction coil, is warming up within 6 minutes 1100 DEG C, keep the temperature 6min；
2) by the mould steel water cooling after heat preservation to 150 DEG C or so rear taking-ups；
3) quenched mould steel is tempered 4 hours at 640 DEG C.
Shown in metallographic structure such as Fig. 1 (a) after tempering.
Wherein, the steel 25Cr3Mo2WNiWVNb is prepared by the following method:
1. by vacuum melting technology, by ingredient percent: C:0.25-0.32wt%；Cr:2.5-3.2wt%；
Mo:1.6-2.5wt%；W:0.2-1.0wt%；Ni:0.5-1.5wt%；V:0.2-1.0wt%；Nb :≤0.1wt%；Si :≤
0.1wt%；Mn :≤0.5wt%, surplus is Fe ingredient, carries out intermediate frequency furnace melting after ingredient, pours into electrode bar stock, so
Electrode bar is forged into forge furnace afterwards；
2. electroslag remelting process: by the resulting electrode bar polishing scale removal of step 1) hammer cogging, being put into electroslag weight
In fusing device, double refining is carried out, electroslag remelting cooling water system water temperature is not higher than 70 DEG C, and passing in and out water temperature difference is 8~10 DEG C,
Electroslag ingot is obtained after electroslag remelting.
3. homogeneous is annealed: heating at least 5h is warming up to 1260 DEG C of 8~10h of heat preservation, then not less than 100 DEG C/h cooling speed
Degree is down to 750 DEG C of heat preservation 6h, is furnace-cooled to 500 DEG C of slow cooling of coming out of the stove later；
4. forging technology: 500 DEG C or so enter furnace 1h after be warming up to 860 DEG C and keep the temperature 1h, heat up by 300 DEG C/h heating rate
To 1160 DEG C of heat preservation 1h, it opens and forges temperature not less than 1100 DEG C, forge temperature eventually not less than 850 DEG C.
Embodiment 2
The present embodiment provides a kind of heat treatment method of hot die steel, the mould steel that the present embodiment uses is specification φ 20
The heat-resistance and wear-resistance steel 25Cr3Mo2WNiVNb (can the method as disclosed by embodiment 1 be prepared) of × 100mm.
Heat treatment method includes the following steps:
1) mould steel is placed in induction coil, is warming up within 6 minutes 1150 DEG C, keep the temperature 3min；
2) by the mould steel water cooling after heat preservation to 150 DEG C or so rear taking-ups；
3) quenched mould steel is tempered 4 hours at 640 DEG C.
Shown in metallographic structure such as Fig. 1 (b) after tempering.
Embodiment 3
The present embodiment provides a kind of heat treatment method of hot die steel, the mould steel that the present embodiment uses is specification φ 40
The heat-resistance and wear-resistance steel 25Cr3Mo2WNiVNb (can the method as disclosed by embodiment 1 be prepared) of × 100mm.
Heat treatment method includes the following steps:
1) mould steel is placed in induction coil, is warming up within 10 minutes 1100 DEG C, keep the temperature 3min；
2) by the mould steel water cooling after heat preservation to 150 DEG C or so rear taking-ups；
3) quenched mould steel is tempered 4 hours at 640 DEG C.
Shown in metallographic structure such as Fig. 1 (c) after tempering.
Embodiment 4
The present embodiment provides a kind of heat treatment method of hot die steel, the mould steel that the present embodiment uses is specification φ 40
The heat-resistance and wear-resistance steel 25Cr3Mo2WNiVNb (can the method as disclosed by embodiment 1 be prepared) of × 100mm.
Heat treatment method includes the following steps:
1) mould steel is placed in induction coil, is warming up within 10 minutes 1150 DEG C, keep the temperature 6min；
2) by the mould steel water cooling after heat preservation to 150 DEG C or so rear taking-ups；
3) quenched mould steel is tempered 4 hours at 640 DEG C.
Shown in metallographic structure such as Fig. 1 (d) after tempering.
Embodiment 5
The present embodiment provides a kind of heat treatment method of hot die steel, the mould steel that the present embodiment uses is specification φ 40
The hot die steel 4Cr3Mo2NiVNbB steel (HD) of × 100mm.
Heat treatment method includes the following steps:
1) mould steel is placed in induction coil, is warming up within 10 minutes 1150 DEG C, keep the temperature 6min；
2) by the mould steel water cooling after heat preservation to 150 DEG C or so rear taking-ups；
3) quenched mould steel is tempered 4 hours at 640 DEG C.
Embodiment 6
The present embodiment provides a kind of heat treatment method of hot die steel, the difference with embodiment 1 is only that:
Step 1): mould steel is placed in induction coil, is warming up within 6 minutes 1300 DEG C, keeps the temperature 6min.
Heat treatment method in comparative example 1, hardness and elevated temperature strength in embodiment 6 after process improve degree
Relatively high, it is relatively low that toughness improves degree.
Embodiment 7
The present embodiment provides a kind of heat treatment method of hot die steel, the difference with embodiment 1 is only that:
Step 2): by the mould steel water cooling after heat preservation to taking out after 120 DEG C.
Heat treatment process in comparative example 1, it is relatively low that the performance in embodiment 7 after process improves degree.
Embodiment 8
The present embodiment provides a kind of heat treatment method of hot die steel, the difference with embodiment 1 is only that:
Step 3): quenched mould steel is tempered 5 hours at 580 DEG C.
Heat treatment process in comparative example 1, hardness and elevated temperature strength in embodiment 8 after process improve degree
Height, toughness improve degree and want relatively low.
Comparative example 1
This comparative example provides a kind of heat treatment method of hot die steel, and the difference with embodiment 1 is only that, step 1)
Are as follows: it is put into electric furnace and is warming up to 980 DEG C of heat preservations 1 hour.
Comparative example 2
This comparative example provides a kind of heat treatment method of hot die steel, and the difference with embodiment 2 is only that, step 1)
Are as follows: it is put into electric furnace and is warming up to 1050 DEG C of heat preservations 1 hour.
Comparative example 3
This comparative example provides a kind of heat treatment method of hot die steel, and the difference with embodiment 3 is only that, step 1)
Are as follows: it is put into electric furnace and is warming up to 980 DEG C of heat preservations 2 hours.
Comparative example 4
This comparative example provides a kind of heat treatment method of hot die steel, and the difference with embodiment 4 is only that, step 1)
Are as follows: it is put into electric furnace and is warming up to 1050 DEG C of heat preservations 2 hours.
Comparative example 5
This comparative example provides a kind of heat treatment method of hot die steel, and the mould steel used is 40 × 100mm of specification φ
Hot die steel 4Cr3Mo2NiVNbB steel (HD)；
Described method includes following steps:
(1) it quenches: by blank heating to 1130 DEG C, keeping the temperature 1h, water cooling, quenching structure is martensite；
(2) it is tempered: by 640 DEG C of blank after quenching, keeping the temperature 4h, come out of the stove air-cooled.
Test example 1
This test example provides the preparation-obtained hot die steel of method provided by embodiment 1-8 and comparative example 1-5
Mechanical property.
Test method: 700 DEG C of drawing by high temperature mechanical test methods refer to GB/T4338-2006；Room temperature impact toughness
Test method refers to GB229-63.
Test result: as shown in table 1.
The performance comparison of hot die steel after table 1, embodiment 1-8, comparative example 1-5 heat treatment
As known from Table 1, compared with common heat treatment method, hot die steel obtained by heat treatment method provided by the present invention
Its elevated temperature strength can be improved while toughness does not reduce.
Test example 2
This test example provides embodiment 1,5, and the preparation-obtained hot die steel of method provided by comparative example 1,5 returns
Fiery stability is tested according to the conventional method of this field.
The results are shown in Table 2.
Table 2
As known from Table 2, material undergoes the Rockwell of material after different tempering temperatures after heat treatment method provided by the present invention
Hardness is higher, therefore the temper resistance of material can be improved in heat treatment method provided by the present invention.
Test example 3
For the product of small lot and small dimension, heat treatment method provided by the present invention can achieve save the time and at
This effect.
Traditional quenching-and-tempering process heating-up time at least needs 1 hour, and soaking time 1 hour, therefore entire tradition heat
Processing at least needs 2 hours；And heat treatment method provided by the present invention only needs 8~15 minutes, therefore provided by the present invention
Heat treatment method can reduced time and cost within certain batch and specification limit.
Although above having used general explanation, specific embodiment and test, the present invention is made to retouch in detail
It states, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed
Range.
Claims (10)
1. a kind of heat treatment method of hot die steel, which comprises the steps of:
1) mould steel is warming up to 1100 DEG C -1300 DEG C with the rate of 80 DEG C -180 DEG C/min, keeps the temperature 3-10min；
2) hot die steel after heat preservation is quenched in quenching media；
3) by quenched hot die steel carry out tempering to get.
2. heat treatment method according to claim 1, which is characterized in that the mould steel at least contains Mo, V, Nb element；
Preferably, in the hot die steel, Mo content be 1-4wt%, V content 0.2-2wt%, Nb content be less than
0.3wt%.
3. heat treatment method according to claim 1 or 2, which is characterized in that in step 1):
Mould steel is warming up to 1100 DEG C -1300 DEG C with the rate of 80 DEG C -150 DEG C/min；Preferably, be warming up to 1100 DEG C-
1150℃。
4. heat treatment method according to claim 1-3, which is characterized in that step 1) use induction coil with into
Row heating and heat preservation.
5. heat treatment method according to claim 1-4, which is characterized in that the diameter of the mould steel be≤
40mm；Preferably, the diameter is 20-40mm.
6. heat treatment method according to claim 1-5, which is characterized in that in step 2):
Mould steel after heat preservation is cooled to 120 DEG C of -160 DEG C of quenchings in quenching media；Preferably, it is cooled to 140-160 DEG C.
7. heat treatment method according to claim 1-6, which is characterized in that in step 3):
Quenched mould steel is subjected to tempering in 550 DEG C of -660 DEG C of heat preservations；
Preferably, soaking time 4-5h, and/or, by quenched mould steel in 580 DEG C of -660 DEG C of heat preservations.
8. heat treatment method according to claim 1-7, which comprises the steps of:
(1) mould steel of 20~40mm of φ is heated up in induction coil after 6~10 minutes to 1100 DEG C~1150 DEG C, heat preservation 3
~6 minutes；
(2) mould steel is taken out into water hardening immediately from induction coil, water cooling is to 140 DEG C -160 DEG C；
(3) it is tempered immediately after quenching, in 580 DEG C of -660 DEG C of heat preservation 4-5h.
9. heat treatment method according to claim 1-8, which is characterized in that the mould steel is
25Cr3Mo2WNiVNb or 4Cr3Mo2NiVNbB steel；
Wherein, the mould steel 25Cr3Mo2WNiVNb according to the raw material of following composition quality ratio by being prepared:
C:0.25-0.32wt%；
Cr:2.5-3.2wt%；
Mo:1.6-2.5wt%；
W:0.2-1.0wt%；
Ni:0.5-1.5wt%；
V:0.2-1.0wt%；
Nb :≤0.1wt%；
Si :≤0.1wt%；
Mn :≤0.5wt%；
Surplus is Fe；
Preferably, the preparation method of the mould steel 25Cr3Mo2WNiVNb includes the following steps:
(1) raw material is forged to electrode bar by vacuum melting；
(2) double refining is carried out to the electrode bar that step (1) obtains and electroslag remelting obtains electroslag ingot；
(3) homogeneous annealing is carried out to the electroslag ingot that step (2) obtains；
(4) to step (3) by homogeneous annealing electroslag ingot forged to get.
10. a kind of hot die steel, which is characterized in that be made by the described in any item heat treatment methods of claim 1-9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392353A (en) * | 2008-10-30 | 2009-03-25 | 上海大学 | High manganese and low chromium type high strength and toughness hot-work die steel and preparation method thereof |
| CN101768659A (en) * | 2010-02-23 | 2010-07-07 | 河南神龙石油钻具有限公司 | Heat treatment technology of ultra-long mandrel |
| CN103305664A (en) * | 2013-06-25 | 2013-09-18 | 宝钢轧辊科技有限责任公司 | High alloy steel hot straightening roll and preparation method thereof |
| CN109487166A (en) * | 2018-12-21 | 2019-03-19 | 北京科技大学 | A kind of high strength at high temperature low-carbon heated die steel and preparation method thereof |
| CN109735777A (en) * | 2019-03-06 | 2019-05-10 | 北京科技大学 | A kind of anti-oxidant hot die steel and preparation method thereof |
-
2019
- 2019-07-19 CN CN201910654397.9A patent/CN110438310B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392353A (en) * | 2008-10-30 | 2009-03-25 | 上海大学 | High manganese and low chromium type high strength and toughness hot-work die steel and preparation method thereof |
| CN101768659A (en) * | 2010-02-23 | 2010-07-07 | 河南神龙石油钻具有限公司 | Heat treatment technology of ultra-long mandrel |
| CN103305664A (en) * | 2013-06-25 | 2013-09-18 | 宝钢轧辊科技有限责任公司 | High alloy steel hot straightening roll and preparation method thereof |
| CN109487166A (en) * | 2018-12-21 | 2019-03-19 | 北京科技大学 | A kind of high strength at high temperature low-carbon heated die steel and preparation method thereof |
| CN109735777A (en) * | 2019-03-06 | 2019-05-10 | 北京科技大学 | A kind of anti-oxidant hot die steel and preparation method thereof |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020152A (en) * | 2019-12-03 | 2020-04-17 | 雷晓芳 | Manufacturing method of hot-work die steel |
| CN111057934A (en) * | 2019-12-24 | 2020-04-24 | 潘少俊 | High-performance hot-work die steel and production process thereof |
| CN111057950A (en) * | 2019-12-27 | 2020-04-24 | 潘少俊 | High-temperature-resistant and high-toughness hot-work die steel and preparation method thereof |
| US11959158B2 (en) | 2020-04-14 | 2024-04-16 | University Of Science & Technology Beijing | Hot-work die steel with high toughness at low temperatures and high strength at high temperatures and high hardenability and preparation method thereof |
| WO2021208181A1 (en) * | 2020-04-14 | 2021-10-21 | 北京科技大学 | Low-temperature, high-toughness, high-temperature, high-intensity and high-hardenability hot mold steel and preparation method therefor |
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| CN111549298A (en) * | 2020-05-20 | 2020-08-18 | 北京科技大学 | Hot work die steel and preparation method thereof |
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| WO2021232275A1 (en) * | 2020-05-20 | 2021-11-25 | 北京科技大学 | Hot-work die steel and preparation method therefor |
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